1. Institute of Engineering Thermodynamics, German Aerospace Center, Pfaffenwaldring 38-40, 70569 Stuttgart, Germany
2. Institute of Building Energetics, Thermal Engineering and Energy Storage, University of Stuttgart, Pfaffenwaldring 31, 70569 Stuttgart, Germany
3. Faculty of Science, Energy and Building Services, Esslingen University of Applied Sciences, Kanalstraße 33, 73728 Esslingen am Neckar, Germany